The interfaces in this namespace all represent a particular plugin type that can be built for LaunchBox/Big Box. Pick the interface that best matches what you're trying to achieve, and create a class that inherits from that interface. Then simply build your DLL, put it in the LaunchBox\Plugins folder (or the subsequent Plugins folder inside of a Big Box theme), and test it out! The PluginHelper static class can be used to get access to LaunchBox data from within any plugin. Also, please note that the Unbroken.LaunchBox.Plugins.Data.IGameBadge interface can be implemented as a plugin as well to add custom badges to the LaunchBox interface.
This namespace contains the data objects and utility classes used to work with data in LaunchBox and Big Box.